Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Start the engine.
2. Test drive the vehicle.
3. With a scan tool, read DTCs.
  Are there any Active or Pending DTCs related to vehicle or wheel speed in any other module?
  
  Yes
  - Refer to the Diagnosis and Testing information of the module with active DTC and perform the diagnostic test procedure.
  No
  - Go To 2
VISUAL INSPECTION
NOTE:
This code can set due to tire circumference differences and from the front or rear wheels being on a slippery surface while the opposite tires are not.
1. This code may also set on a hard acceleration on loose gravel or during other off road driving conditions.
2. Check tire pressure of all the tires.
3. Check tire wear on all the tires.
4. Ask the customer what the road and driving conditions were like when the fault set.
  Were any problems found?
  
  Yes
  - Repair as necessary. If the code set during a front OR rear wheel spin condition, no repair is necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
POWERTRAIN CONTROL MODULE (PCM)
1. Using the appropriate SYSTEM WIRING DIAGRAM/schematic as a guide, inspect the wiring and connectors between the Vehicle Speed Sensors, ABS Module, and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Vehicle Speed Sensors, ABS Module, and Powertrain Control Module connectors.
4. Perform any Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .